AI-generated practice questions — Science (CBSE Class 10)

AI-generated practice questions for Science, with model answers. These are not previous-year board questions — they are model-generated for extra practice. 351 question(s), grouped by chapter and skill.

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Chemistry · Chapter 1: Chemical Reactions and Equations (10)

• Which of the following is NOT a correct indicator that a chemical reaction has taken place? (a) Change in col…
• In the electrolysis of water (Activity 1.7), the volume of gas collected in one test tube is double that of t…
• State the law of conservation of mass and explain why a skeletal chemical equation must be balanced. Use the…
• When iron nails are dipped in copper sulphate solution, the blue colour of the solution fades and the nails t…
• Decomposition reactions are said to be the opposite of combination reactions. Justify this statement with one…
• Consider the reaction: CuO(s) + H₂(g) → Cu(s) + H₂O(l). Identify which substance is oxidised and which is red…
• What is the difference between a displacement reaction and a double displacement reaction? Write one balanced…
• Analyse the reaction 2Pb(NO₃)₂(s) → 2PbO(s) + 4NO₂(g) + O₂(g). (a) What type of reaction is this, and what fo…
• Rancidity and corrosion are both consequences of oxidation reactions in daily life. Compare the two phenomena…
• What physical state symbol is used for a substance dissolved in water in a chemical equation?

Chemistry · Chapter 2: Acids, Bases and Salts (159)

• A solution turns red litmus blue. Which of the following is the most likely pH of this solution? (a) 2 (b) 5…
• What is an olfactory indicator? Name any one substance that can be used as an olfactory indicator.
• Why should acid always be added to water and not water to acid while preparing a dilute solution? What is the…
• State what is observed when carbon dioxide gas is passed through lime water. What happens when excess carbon…
• Compounds like glucose and alcohol contain hydrogen atoms in their molecules but are NOT classified as acids.…
• Fresh milk has a pH of 6. Explain what happens to its pH when it turns into curd and why. A milkman adds a sm…
• With the help of balanced chemical equations, explain the chlor-alkali process. Name the products formed and…
• What is water of crystallisation? A student heats blue crystals of copper sulphate in a boiling tube and then…
• Dry HCl gas does not change the colour of dry blue litmus paper, but HCl dissolved in water (hydrochloric aci…
• The pH scale is central to understanding the behaviour of acids and bases in living systems and everyday life…
• What is the taste of acids?
• What is the taste of bases?
• What colour change does blue litmus paper show when dipped in an acid?
• What colour change does red litmus paper show when dipped in a base?
• Name the plant from which litmus solution is extracted.
• What is the colour of litmus solution when it is neither acidic nor basic?
• Name any two natural acid-base indicators mentioned in the chapter.
• Name any two synthetic indicators mentioned in the chapter.
• What are olfactory indicators? Give one example from the chapter.
• Which of the following is a natural acid-base indicator? (a) Methyl orange (b) Phenolphthalein (c) Turmeric (…
• Write the general equation (in words) for the reaction of an acid with a metal.
• Which gas is evolved when zinc granules react with dilute sulphuric acid? How is this gas tested?
• Write the balanced chemical equation for the reaction of zinc with sodium hydroxide solution.
• What is the name of the product formed when zinc reacts with sodium hydroxide?
• Write the general word equation for the reaction of a metal carbonate or metal hydrogencarbonate with an acid.
• What happens when carbon dioxide gas is passed through lime water? Write the chemical equation.
• What happens when excess carbon dioxide is passed through lime water that has turned milky?
• Name three naturally occurring forms of calcium carbonate mentioned in the chapter.
• What is a neutralisation reaction? Write a general equation.
• Write the chemical equation for the reaction between NaOH and HCl.
• What colour does phenolphthalein turn in a basic solution?
• What is the general equation for the reaction between a metal oxide and an acid?
• Why are metallic oxides called basic oxides?
• Why are non-metallic oxides considered acidic in nature?
• What colour does the solution turn when copper oxide dissolves in dilute hydrochloric acid?
• In Activity 2.8, the bulb glows when dilute HCl is taken in the beaker but does NOT glow with glucose solutio…
• What type of ions are responsible for the acidic properties of an acid in aqueous solution?
• What is a hydronium ion? Write the equation for its formation.
• Which ions are produced when a base dissolves in water?
• What is an alkali?
• In Activity 2.9, dry HCl gas does NOT change the colour of dry blue litmus paper, but wet blue litmus paper t…
• Why must acid always be added to water, and not water to a concentrated acid?
• What is dilution of an acid or base?
• What does the 'p' in pH stand for, and in which language does it originate?
• What is the pH range of the pH scale generally used?
• What is the pH of a neutral solution?
• A solution with pH = 3 is: (a) Neutral (b) Weakly basic (c) Strongly acidic (d) Weakly acidic
• What is a universal indicator and what is it used for?
• What is the pH range within which the human body works?
• What is acid rain? At what pH of rain water is it called acid rain?
• What is the effect of acid rain on aquatic life in rivers?
• At what pH level does tooth decay start?
• What is tooth enamel made of and why is it important?
• How does using a toothpaste help prevent tooth decay?
• What acid does a bee sting leave on the skin? What is the suggested remedy?
• What acid is injected by the stinging hair of nettle leaves?
• What type of acid is present in vinegar?
• Which acid is found in tamarind?
• Which acid is present in lemon and orange?
• What is the acid produced in the human stomach that helps in digestion?
• What are antacids? Name one mild base used as an antacid.
• Salts of a strong acid and strong base have a pH value of: (a) Less than 7 (b) More than 7 (c) Exactly 7 (d) 0
• What is the pH of a salt formed from a strong acid and a weak base?
• What is rock salt? How are its beds formed?
• What is the chlor-alkali process?
• Write the balanced chemical equation for the chlor-alkali process.
• In the chlor-alkali process, which gas is produced at the anode and which at the cathode?
• How is bleaching powder produced? Write the chemical equation.
• What is the chemical formula of bleaching powder?
• State any two uses of bleaching powder.
• What is the chemical name of baking soda? Write its chemical formula.
• Write the chemical equation for the preparation of baking soda from sodium chloride.
• What happens when baking soda is heated? Write the chemical equation.
• What is baking powder? How does it make bread or cake soft and spongy?
• State any two uses of baking soda.
• What is the chemical name and formula of washing soda?
• How is washing soda obtained from baking soda?
• State any two uses of washing soda.
• What is water of crystallisation?
• What is the chemical formula of hydrated copper sulphate and how many water molecules are present in one form…
• What change in colour and state is observed when copper sulphate crystals are heated strongly?
• What is gypsum? Write its chemical formula.
• What is Plaster of Paris? How is it obtained from gypsum?
• Write the chemical equation for the reaction of Plaster of Paris with water.
• State any two uses of Plaster of Paris.
• Why should Plaster of Paris be stored in a moisture-proof container?
• The chemical formula of washing soda is: (a) Na₂CO₃ (b) NaHCO₃ (c) Na₂CO₃·10H₂O (d) NaCl
• Which medicine type is used for treating indigestion caused by excess acid in the stomach? (a) Antibiotic (b)…
• A solution turns red litmus blue. Its pH is most likely: (a) 1 (b) 4 (c) 5 (d) 10
• Why does the human stomach not get harmed by the hydrochloric acid it produces during digestion?
• Why should curd and sour substances not be kept in brass or copper vessels?
• Explain why distilled water does not conduct electricity, whereas rain water does.
• HCl and CH₃COOH (acetic acid) of the same concentration are taken. Which produces more H⁺ ions? What does thi…
• Fresh milk has a pH of 6. What will happen to the pH as it turns into curd? Explain why.
• A milkman adds a small amount of baking soda to fresh milk. (a) Why does he shift the pH to slightly alkaline…
• Equal lengths of magnesium ribbons are taken in two test tubes. HCl is added to one and CH₃COOH of the same c…
• Under what soil condition would a farmer treat his fields with quicklime (CaO) or slaked lime [Ca(OH)₂]? Give…
• Do basic solutions also contain H⁺(aq) ions? If yes, why are they still basic?
• You have two solutions: Solution A has pH = 6 and Solution B has pH = 8. (a) Which has more H⁺ ion concentrat…
• A metal compound A reacts with dilute HCl to produce effervescence. The gas evolved extinguishes a burning ca…
• Describe an activity to show that compounds like glucose and alcohol contain hydrogen but are not acids.
• With the help of an activity, show that acids produce H⁺ ions only in the presence of water (i.e., HCl gas is…
• Describe the chlor-alkali process. Name all the products obtained and state one use of each.
• Trace the connection between common salt (NaCl) and the following useful compounds: (i) Sodium hydroxide (ii)…
• Explain how the concept of pH is important in everyday life by giving any THREE examples from the chapter.
• What is the significance of the fact that acids produce H₃O⁺ ions and bases produce OH⁻ ions in water? Use th…
• How do you distinguish between a strong acid and a weak acid of the same concentration? Explain with an examp…
• Why does the process of dissolving a concentrated acid or base in water have to be carried out carefully? Wha…
• Explain why the lactic acid produced in sour milk (curd) is listed as an acid, while milk itself has a pH of…
• What family of salts do NaCl and Na₂SO₄ belong to? What family do NaCl and KCl belong to?
• The atmosphere of Venus is made up of thick clouds of which acid? Why does the chapter mention this?
• Why is calcium sulphate hemihydrate called 'Plaster of Paris'?
• In the formula CaSO₄·½H₂O, how can half a water molecule be attached to the salt? Explain.
• What is the role of CO₂ produced during the reaction of baking powder in bread-making?
• Name the substance used to remove permanent hardness of water.
• Describe with the help of a labelled diagram the Activity used to test whether zinc reacts with dilute sulphu…
• The following statements are given about the pH scale: Assertion: A solution with pH = 12 is strongly basic.…
• The traditional remedy for a nettle sting is to rub the affected area with a dock plant leaf. What does this…
• Which ion is responsible for the acidic nature of a solution?
• What is the pH of a neutral solution?
• Name the process by which an aqueous solution of sodium chloride is electrolysed to give sodium hydroxide.
• What is the chemical name of baking soda?
• What is 'water of crystallisation'?
• Name one olfactory indicator mentioned in the chapter.
• At what pH does tooth decay begin?
• What is the chemical formula of Plaster of Paris?
• A solution turns blue litmus red. What is the nature of the solution? (a) Basic (b) Neutral (c) Acidic (d) Am…
• Which gas is evolved when zinc reacts with dilute sulphuric acid? (a) Oxygen (b) Carbon dioxide (c) Hydrogen…
• Which of the following has a pH greater than 7? (a) Lemon juice (b) Vinegar (c) Sodium hydroxide solution (d)…
• The chemical formula of washing soda is: (a) Na₂CO₃ (b) Na₂CO₃.10H₂O (c) NaHCO₃ (d) NaOH
• What happens when carbon dioxide is passed in excess through lime water? Write the chemical equation for the…
• Write the balanced chemical equation for the reaction between sodium carbonate and dilute hydrochloric acid.
• State two uses of bleaching powder.
• Write the reaction involved in the preparation of bleaching powder from slaked lime and chlorine.
• What is a neutralisation reaction? Write the general equation representing it.
• Why do HCl and H₂SO₄ show acidic character in aqueous solution while glucose solution does not, even though g…
• Explain why dry HCl gas does not change the colour of dry litmus paper, but HCl solution (hydrochloric acid)…
• A farmer finds that the pH of his field soil is 4. What problem might his crops face? What should he add to t…
• Describe the chlor-alkali process. Write the chemical equation involved and name the products formed at each…
• Copper sulphate crystals (CuSO₄.5H₂O) appear blue but turn white on heating. Explain why. What happens when w…
• Why is it advised to add acid to water and not water to acid while preparing a dilute acid solution? What pro…
• When baking soda is heated, it undergoes a chemical change. Write the balanced equation for this reaction. Wh…
• Equal amounts of magnesium ribbon are placed in two test tubes — one containing HCl and the other containing…
• Fresh milk has a pH of 6. As it turns into curd, does the pH increase or decrease? Explain why.
• What are strong and weak acids? How does the pH scale help us distinguish between them? Give one example of e…
• Explain why Plaster of Paris must be stored in a moisture-proof container. Write the chemical equation to sup…
• (a) With the help of a labelled diagram and a balanced chemical equation, describe the reaction of zinc granu…
• (a) What is the pH scale? What does a pH value of less than 7, equal to 7 and greater than 7 indicate about a…
• (a) What is a universal indicator? How is it different from a single indicator like litmus? (b) Describe how…
• (a) What happens when sodium hydroxide reacts with zinc metal? Write the balanced chemical equation. (b) How…
• (a) Describe the preparation of sodium hydrogencarbonate (baking soda) from sodium chloride. Write the chemic…
• A bee sting causes pain and irritation. A traditional remedy is to apply baking soda on the sting. On the oth…
• A student sets up the electrical conductivity apparatus (as in Activity 2.8) and tests the following solution…
• The pH of rain water is normally 5.6, but in some industrial regions it drops to below 5. Analyse this situat…
• Metallic oxides react with acids while non-metallic oxides react with bases. Using one example each with bala…
• A milkman adds a small amount of baking soda to fresh milk (pH 6) to make it slightly alkaline. (a) Why does…
• Consider the following salts: sodium chloride, sodium carbonate, ammonium chloride, and sodium acetate. (a) W…
• Hydrogen ions (H⁺) cannot exist alone in solution. Explain what happens to H⁺ ions in the presence of water.…
• Gypsum (CaSO₄.2H₂O) is heated at 373 K to form Plaster of Paris. (a) Write the chemical equation for this cha…

Biology · Chapter 5: Life Processes (182)

• What are life processes?
• Which of the following is NOT considered a life process? (a) Nutrition (b) Respiration (c) Excretion (d) Loco…
• Name the two types of nutrition seen in organisms.
• What is the term used for organisms that prepare their own food using inorganic materials and sunlight?
• Which organelle in plant cells contains chlorophyll?
• The process by which green plants make food using sunlight, carbon dioxide and water is called: (a) Respirati…
• What is the role of guard cells in a leaf?
• Name the enzyme present in saliva and state its function.
• Where in the human body does the complete digestion of carbohydrates, proteins and fats take place?
• What is the function of hydrochloric acid in the stomach?
• Which of the following enzymes is secreted by the pancreas to digest proteins? (a) Lipase (b) Amylase (c) Try…
• What are villi, and where are they found?
• Name any two organisms that exhibit heterotrophic nutrition by breaking down food material outside the body b…
• What is the first step in the break-down of glucose during cellular respiration?
• The break-down of pyruvate using oxygen takes place in which cell organelle? (a) Nucleus (b) Cytoplasm (c) Ch…
• What is anaerobic respiration?
• What substance is produced when pyruvate is broken down anaerobically in yeast?
• Why do muscles experience cramps during sudden intense activity?
• What is ATP and why is it important in cellular respiration?
• Name the tiny balloon-like structures in the lungs where exchange of gases takes place.
• Which respiratory pigment carries oxygen in human blood, and in which cells is it found? (a) Haemoglobin, red…
• How is carbon dioxide mainly transported in human blood?
• Name the four chambers of the human heart.
• What is double circulation?
• Which type of blood vessel carries blood away from the heart? (a) Veins (b) Capillaries (c) Arteries (d) Lymp…
• Why do arteries have thick, elastic walls?
• What is the role of platelets in the blood?
• What is lymph and how is it formed?
• Name the two types of vascular tissue in plants and state what each transports.
• What is transpiration?
• The transport of soluble products of photosynthesis in plants is called: (a) Transpiration (b) Translocation…
• What energy source is used for translocation in phloem?
• Name the components of the human excretory system.
• What is the basic filtration unit of the kidney called?
• The cup-shaped end of a coiled tube that collects filtrate in the kidney is called: (a) Nephron (b) Ureter (c…
• Name two nitrogenous waste products that are removed from the blood by the kidneys.
• How do plants store their waste products?
• What is an artificial kidney and on what principle does it work?
• What is the role of bile juice in digestion?
• Describe in brief the three events that occur during photosynthesis.
• Why do herbivores have a longer small intestine compared to carnivores?
• Why is it necessary for the heart to have separate chambers for oxygenated and deoxygenated blood?
• Name two functions of transpiration in plants.
• Mucus is secreted by gastric glands in the stomach. What is its function?
• Explain the process of nutrition in Amoeba.
• What is the normal systolic and diastolic blood pressure in human beings?
• Describe the structure and function of the human respiratory system.
• With the help of information from the chapter, explain how water is transported from the roots to the leaves…
• Describe the process of digestion of food in the human alimentary canal, starting from the mouth to the small…
• Compare aerobic and anaerobic respiration in terms of: (i) presence of oxygen, (ii) products formed, (iii) am…
• Explain how the structure of nephrons in the kidney helps in filtering blood and forming urine.
• What molecule is produced during cellular respiration that is used to fuel all other activities in the cell?
• Which enzyme present in saliva breaks down starch into simple sugars?
• Name the basic filtration unit of the kidney.
• In which part of the cell does the first step of glucose breakdown (glycolysis) take place?
• Which of the following correctly describes the function of bile juice? (a) It digests proteins in the small i…
• Which of the following is the correct sequence of events in photosynthesis? (a) Reduction of CO₂ → Splitting…
• In the context of blood circulation, what is meant by 'double circulation', and which animals exhibit it?
• What is the role of guard cells in a leaf?
• Why does the mucus lining of the stomach not get digested by pepsin under normal conditions?
• Explain why the length of the small intestine differs between herbivores and carnivores. What does this tell…
• During sudden intense exercise, a person experiences muscle cramps. Using your knowledge of respiration, expl…
• Differentiate between aerobic and anaerobic respiration with respect to: (i) site of the process, (ii) end pr…
• Why is it important for the small intestine to have villi? How does their structure support their function?
• Explain how the opening and closing of stomata is controlled by guard cells. Why does the plant need to close…
• Distinguish between xylem and phloem transport in plants with respect to: (i) substances transported, (ii) di…
• What is transpiration? Explain its dual importance to a plant beyond simply losing water.
• Why do arteries have thick, elastic walls while veins have valves? Relate each feature to the nature of blood…
• In human beings, why is carbon dioxide transported mainly in dissolved form in the blood whereas oxygen requi…
• Describe the process of urine formation in the nephron, clearly distinguishing between filtration and selecti…
• Describe the process of photosynthesis, including the raw materials required, the conditions necessary, and t…
• Describe the journey of food through the human alimentary canal, explaining the role of each digestive organ…
• Explain the structure and functioning of the human heart, describing how oxygenated and deoxygenated blood ar…
• Compare and contrast the excretory strategies used by plants and human beings. In your answer, refer to the s…
• The chapter states that 'viruses do not show any molecular movement in them (until they infect some cell)'. U…
• Explain how water moves from the soil all the way to the leaves of a tall tree. Your answer should mention ro…
• The alveoli in the lungs and the nephrons in the kidneys both perform filtration or exchange functions. Compa…
• A student seals a healthy potted plant inside an airtight glass jar and places it in bright sunlight for seve…
• Why is it said that heterotrophic organisms depend directly or indirectly on autotrophs? Give one example eac…
• In hemodialysis (artificial kidney), the dialysing fluid is kept devoid of nitrogenous wastes but has the sam…
• The chapter mentions that ATP is like a 'battery' that can provide energy for many different cellular uses. U…
• Why do biologists consider molecular movements necessary for life, even though they are invisible to the nake…
• Why is simple diffusion insufficient to meet the oxygen requirements of multicellular organisms like humans?
• The process of acquiring oxygen from outside the body and using it to break down food sources is called:
• Define life processes.
• Distinguish between autotrophic and heterotrophic nutrition, giving an example of organisms for each.
• List the three events that occur during the process of photosynthesis.
• In the leaf, the green dots seen under a microscope are cell organelles called:
• Explain how the opening and closing of stomata is controlled, and why a plant closes its stomata when it does…
• In Activity 5.1, why is the variegated plant first kept in a dark room for three days before testing for star…
• Where do plants obtain each of the raw materials required for photosynthesis?
• Name two examples of organisms that break down food material outside their body and then absorb it.
• Describe how nutrition takes place in Amoeba.
• Why is parasitic nutrition described as a strategy where organisms 'derive nutrition from plants or animals w…
• What is the role of hydrochloric acid in the stomach?
• Explain why herbivores like cows have a longer small intestine than carnivores like tigers.
• Describe how the small intestine is designed to absorb digested food efficiently.
• Explain the role of bile juice in the digestion of fats in the small intestine.
• Trace the complete path of food through the human alimentary canal, naming the digestive juices/enzymes that…
• In all forms of respiration, the first step is the breakdown of glucose into a three-carbon molecule called:
• Compare aerobic and anaerobic respiration, and name some organisms that use the anaerobic mode of respiration.
• Why do our muscles sometimes get cramps during sudden vigorous activity?
• What is ATP and why is it called the 'energy currency' of the cell?
• Why is the rate of breathing in aquatic organisms much faster than in terrestrial organisms?
• How are the lungs designed in human beings to maximise the area for the exchange of gases?
• How are oxygen and carbon dioxide transported in human beings?
• List the components of the human transport system and state one function of each.
• Describe double circulation of blood in human beings and explain why it is necessary.
• Explain how water is transported upward in tall plants, distinguishing the roles of root pressure and transpi…
• What are the differences between transport of materials in xylem and phloem?
• Describe the structure and functioning of a nephron, explaining how urine is formed and how its amount is reg…
• The processes which together perform the maintenance job in living organisms are called __________.
• Which of the following is NOT considered a life process described in the chapter?
• Name the process by which a source of energy from outside the body is transferred to the inside of the organi…
• Why is invisible molecular movement considered necessary for life according to the chapter?
• Why is there a controversy about whether viruses are truly alive?
• Why is simple diffusion insufficient to meet the oxygen requirements of multicellular organisms like humans?
• Organisms that use simple inorganic sources like carbon dioxide and water for nutrition are called __________.
• Which of the following is an example of an autotroph?
• What are bio-catalysts used by organisms to break down complex substances called?
• Name the green organelles in leaf cells that contain chlorophyll.
• List the three events that occur during the process of photosynthesis.
• In what form do plants store carbohydrates that are not used immediately?
• In what form is energy from food stored in our bodies?
• The tiny pores on the surface of leaves through which gaseous exchange takes place are called __________.
• What controls the opening and closing of the stomatal pore?
• Explain why the stomata close when the plant does not need carbon dioxide.
• Name two minerals besides nitrogen that plants take up from the soil.
• Why is nitrogen an essential element for plants?
• What are the differences between autotrophic nutrition and heterotrophic nutrition?
• Name the nutritive strategy used by cuscuta, ticks, lice, leeches and tape-worms.
• Describe how Amoeba obtains and digests its food.
• In Paramoecium, food is moved to a specific spot by the movement of __________.
• The long tube extending from the mouth to the anus is called the __________.
• What is the role of saliva in the digestion of food?
• Name the enzyme in saliva that breaks down starch.
• The rhythmic muscular contractions that push food forward along the gut are called __________.
• Which three substances are released by the gastric glands in the stomach wall?
• What is the role of hydrochloric acid in our stomach?
• Which enzyme present in the gastric juice digests proteins in the stomach?
• Why do herbivores eating grass need a longer small intestine than carnivores?
• What is the function of bile salts in the digestion of fats?
• Name the finger-like projections on the inner lining of the small intestine that increase surface area for ab…
• How is the small intestine designed to absorb digested food?
• Where does the complete digestion of carbohydrates, proteins and fats take place?
• What is the first step common to all pathways in which glucose is broken down for energy, and where does it o…
• Pyruvate is a __________-carbon molecule.
• What are the products formed when pyruvate is broken down in yeast during fermentation?
• What are the differences between aerobic and anaerobic respiration? Name an organism that uses the anaerobic…
• What causes cramps in our muscles during sudden activity?
• What is the energy currency for most cellular processes?
• Why is the rate of breathing in aquatic organisms much faster than in terrestrial organisms?
• Name the balloon-like structures in the lungs where exchange of gases takes place.
• How are the lungs designed in human beings to maximise the area for exchange of gases?
• Name the respiratory pigment in human beings that has a high affinity for oxygen.
• How are oxygen and carbon dioxide transported in human beings?
• What is the function of rings of cartilage present in the throat?
• Which of the following carries blood away from the heart to various organs?
• What is the function of platelet cells in the blood?
• Why is it necessary to separate oxygenated and deoxygenated blood in mammals and birds?
• How many chambers does a fish heart have, and how many times does blood pass through it in one cycle?
• Describe the double circulation of blood in human beings and explain why it is necessary.
• Name the colourless fluid, similar to plasma but with less protein, involved in transportation.
• Which tissue transports water and minerals from the soil in plants?
• The loss of water in the form of vapour from the aerial parts of the plant is called __________.
• How are water and minerals transported in plants?
• What are the differences between the transport of materials in xylem and phloem?
• The transport of soluble products of photosynthesis from leaves to other parts of the plant is called _______…
• List the parts that make up the excretory system of human beings.
• What is the basic filtration unit of the kidney called?
• Describe the structure and functioning of a nephron.
• How is the amount of urine produced regulated in our body?
• Which of the following is a method used by plants to get rid of excretory products?
• Name two forms in which waste products are stored in old xylem of plants.
• What would be the consequences of a deficiency of haemoglobin in our bodies?
• What are the necessary conditions for autotrophic nutrition and what are its byproducts?
• What advantage over an aquatic organism does a terrestrial organism have with regard to obtaining oxygen for…
• In which part of the cell does the breakdown of pyruvate using oxygen take place?
• Why do ventricles have thicker muscular walls than atria?
• Why do veins have valves but arteries do not need them?
• What is the function of digestive enzymes?
• How are fats digested in our bodies and where does this process take place?